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Diffstat (limited to 'contrib/llvm/lib/Target/X86/X86JITInfo.h')
-rw-r--r-- | contrib/llvm/lib/Target/X86/X86JITInfo.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/X86/X86JITInfo.h b/contrib/llvm/lib/Target/X86/X86JITInfo.h new file mode 100644 index 0000000..238420c --- /dev/null +++ b/contrib/llvm/lib/Target/X86/X86JITInfo.h @@ -0,0 +1,81 @@ +//===- X86JITInfo.h - X86 implementation of the JIT interface --*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains the X86 implementation of the TargetJITInfo class. +// +//===----------------------------------------------------------------------===// + +#ifndef X86JITINFO_H +#define X86JITINFO_H + +#include "llvm/Function.h" +#include "llvm/CodeGen/JITCodeEmitter.h" +#include "llvm/Target/TargetJITInfo.h" + +namespace llvm { + class X86TargetMachine; + class X86Subtarget; + + class X86JITInfo : public TargetJITInfo { + X86TargetMachine &TM; + const X86Subtarget *Subtarget; + uintptr_t PICBase; + char* TLSOffset; + public: + explicit X86JITInfo(X86TargetMachine &tm); + + /// replaceMachineCodeForFunction - Make it so that calling the function + /// whose machine code is at OLD turns into a call to NEW, perhaps by + /// overwriting OLD with a branch to NEW. This is used for self-modifying + /// code. + /// + virtual void replaceMachineCodeForFunction(void *Old, void *New); + + /// emitGlobalValueIndirectSym - Use the specified JITCodeEmitter object + /// to emit an indirect symbol which contains the address of the specified + /// ptr. + virtual void *emitGlobalValueIndirectSym(const GlobalValue* GV, void *ptr, + JITCodeEmitter &JCE); + + // getStubLayout - Returns the size and alignment of the largest call stub + // on X86. + virtual StubLayout getStubLayout(); + + /// emitFunctionStub - Use the specified JITCodeEmitter object to emit a + /// small native function that simply calls the function at the specified + /// address. + virtual void *emitFunctionStub(const Function* F, void *Target, + JITCodeEmitter &JCE); + + /// getPICJumpTableEntry - Returns the value of the jumptable entry for the + /// specific basic block. + virtual uintptr_t getPICJumpTableEntry(uintptr_t BB, uintptr_t JTBase); + + /// getLazyResolverFunction - Expose the lazy resolver to the JIT. + virtual LazyResolverFn getLazyResolverFunction(JITCompilerFn); + + /// relocate - Before the JIT can run a block of code that has been emitted, + /// it must rewrite the code to contain the actual addresses of any + /// referenced global symbols. + virtual void relocate(void *Function, MachineRelocation *MR, + unsigned NumRelocs, unsigned char* GOTBase); + + /// allocateThreadLocalMemory - Each target has its own way of + /// handling thread local variables. This method returns a value only + /// meaningful to the target. + virtual char* allocateThreadLocalMemory(size_t size); + + /// setPICBase / getPICBase - Getter / setter of PICBase, used to compute + /// PIC jumptable entry. + void setPICBase(uintptr_t Base) { PICBase = Base; } + uintptr_t getPICBase() const { return PICBase; } + }; +} + +#endif |